VULNERABILITY INTELLIGENCE

CVE-2020-28024

CVSS score9.8 CRITICAL
EPSS probability4.15%
CISA KEVNot currently listed
Published2021-05-06
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

Exim 4 before 4.94.2 allows Buffer Underwrite that may result in unauthenticated remote attackers executing arbitrary commands, because smtp_ungetc was only intended to push back characters, but can actually push back non-character error codes such as EOF.

Weakness classification

  • nvd@nist.gov: CWE-787

Primary references